1/14/2024 0 Comments Edwin hubble background![]() ![]() The brightest, and therefore farthest detectable milepost markers are Type Ia supernovae. This required building a string of cosmic distance ladders assembled from sources that astronomers have a reasonable confidence in their intrinsic brightness. ![]() He suspected his measurements might be evidence of something else more oddball going on in the universe.įor decades after Hubble, astronomers have toiled to nail down the expansion rate that would yield a true age for the universe. Hubble even said that he studied the galaxies simply as "markers of space." However he was never fully convinced of the idea of a uniformly expanding universe. This could be interpreted as the uniform expansion of space. Hubble found that the farther a galaxy is, the faster it appears to be moving away from us. And, the galaxies weren't standing still. The first act of this revelation came when, a century ago, American astronomer Edwin Hubble discovered myriad galaxies outside of our home galaxy, the Milky Way. What's more, we wouldn't have a clue about its age either – or in fact if the universe was eternal. Without any observational evidence for space expanding, contracting, or standing still, we wouldn't have a clue to whether the universe was coming or going. Science history will record that the search for the expansion rate of the universe was the great Holy Grail of 20th century cosmology. Four Successful Women Behind the Hubble Space Telescope's Achievements.Characterizing Planets Around Other Stars.Measuring the Universe's Expansion Rate. ![]()
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